Rotational period variations in magnetic chemically peculiar
star HD 37776

k 2011

Rotational period variations in magnetic chemically peculiar star HD 37776

MIKULÁŠEK, Zdeněk; Jiří KRTIČKA; G.W. HENRY; Jan JANÍK; Miloslav ZEJDA et al.

Základní údaje

Originální název

Rotational period variations in magnetic chemically peculiar star HD 37776

Autoři

MIKULÁŠEK, Zdeněk; Jiří KRTIČKA; G.W. HENRY; Jan JANÍK ; Miloslav ZEJDA; T. LUEFTINGER; Ernst PAUNZEN; I. I. ROMANYUK a D.O. KUDRYAVTSEV

Vydání

European Week of Astronomy and Space Science, JENAM 2011, July 4 to 8 2011 in Saint-Petersburg, Russia, 2011

Další údaje

Jazyk

angličtina

Typ výsledku

Prezentace na konferencích

Obor

10308 Astronomy

Stát vydavatele

Rusko

Utajení

není předmětem státního či obchodního tajemství

Odkazy

webovská stránka akce

Označené pro přenos do RIV

Ano

Kód RIV

RIV/00216224:14310/11:00049549

Organizační jednotka

Přírodovědecká fakulta

Klíčová slova česky

chemicky pekuliární hvězdy; magnetické hvězdy; fotometrie; V901 Ori

Klíčová slova anglicky

chemical peculiar star; magnetic stars; photometry; V901 Ori

Příznaky

Mezinárodní význam

Změněno: 8. 4. 2012 18:39, doc. RNDr. Miloslav Zejda, Ph.D.

Anotace

V originále

Three decades of a precise photometric and spectroscopic monitoring of the young hot magnetic chemically peculiar star HD 37776 have revealed its continual rotational deceleration, increasing the period by a remarkable 18 s! The deceleration was interpreted as the rotational braking of the outer stellar layers due to the angular momentum loss in the stellar magnetosphere. Observational data have been recently supplemented by own new photometric data. We present here the results of the sophisticated analysis of all available observed data showing that the period reached its maximum of 1.538766 d in the year 2004, when the rotation period began to decrease. The nature of such unpredicted period changes and the paradox of the spin-down time are briefly discussed.

Návaznosti

IAA301630901, projekt VaV

Název: Rozložení energie ve spektru horkých hvězd a jeho proměnnost

Investor: Akademie věd ČR, Rozložení energie ve spektru horkých hvězd a jeho proměnnost

MUNI/A/0968/2009, interní kód MU

Název: Fyzika hvězd a hvězdných soustav (Akronym: FYHA)

Investor: Masarykova univerzita, Fyzika hvězd a hvězdných soustav, DO R. 2020_Kategorie A - Specifický výzkum - Studentské výzkumné projekty

Citovat

MIKULÁŠEK, Zdeněk; Jiří KRTIČKA; G.W. HENRY; Jan JANÍK; Miloslav ZEJDA; T. LUEFTINGER; Ernst PAUNZEN; I. I. ROMANYUK a D.O. KUDRYAVTSEV. Rotational period variations in magnetic chemically peculiar star HD 37776. In European Week of Astronomy and Space Science, JENAM 2011, July 4 to 8 2011 in Saint-Petersburg, Russia. 2011.

@proceedings{978705,
   author = {Mikulášek, Zdeněk and Krtička, Jiří and Henry, G.W. and Janík, Jan and Zejda, Miloslav and Lueftinger, T. and Paunzen, Ernst and Romanyuk, I. I. and Kudryavtsev, D.O.},
   booktitle = {European Week of Astronomy and Space Science, JENAM 2011, July 4 to 8 2011 in Saint-Petersburg, Russia},
   keywords = {chemical peculiar star; magnetic stars; photometry; V901 Ori},
   language = {eng},
   title = {Rotational period variations in magnetic chemically peculiar star HD 37776},
   url = {http://jenam2011.org/conf/},
   year = {2011}
}

TY  - CONF
ID  - 978705
AU  - Mikulášek, Zdeněk - Krtička, Jiří - Henry, G.W. - Janík, Jan - Zejda, Miloslav - Lueftinger, T. - Paunzen, Ernst - Romanyuk, I. I. - Kudryavtsev, D.O.
PY  - 2011
TI  - Rotational period variations in magnetic chemically peculiar star HD 37776
KW  - chemical peculiar star
KW  - magnetic stars
KW  - photometry
KW  - V901 Ori
UR  - http://jenam2011.org/conf/
L2  - http://jenam2011.org/conf/
N2  - Three decades of a precise photometric and spectroscopic monitoring of the young hot magnetic chemically peculiar star HD 37776 have revealed its continual rotational deceleration, increasing the period by a remarkable 18 s! The deceleration was interpreted as the rotational braking of the outer stellar layers due to the angular momentum loss in the stellar magnetosphere. Observational data have been recently supplemented by own new photometric data. We present here the results of the sophisticated analysis of all available observed data showing that the period reached its maximum of 1.538766 d in the year 2004, when the rotation period began to decrease. The nature of such unpredicted period changes and the paradox of the spin-down time are briefly discussed.
ER  -

MIKULÁŠEK, Zdeněk; Jiří KRTIČKA; G.W. HENRY; Jan JANÍK; Miloslav ZEJDA; T. LUEFTINGER; Ernst PAUNZEN; I. I. ROMANYUK a D.O. KUDRYAVTSEV. Rotational period variations in magnetic chemically peculiar star HD 37776. In \textit{European Week of Astronomy and Space Science, JENAM 2011, July 4 to 8 2011 in Saint-Petersburg, Russia}. 2011.

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